Sector: A sector is a part of a circle.
Chord: A chord is a straight line connecting two points on a circle.
Diameter: A diameter is a straight line passing through the center of the circle and touching two points on the circle.
Diagonal: A diagonal, on the other hand, is not specific to circles; it refers to a line connecting two non-adjacent vertices of a polygon.
Therefore, the correct group consists of 1, 2, and 4.
The diagram below shows a river system consisting of 7 segments, marked P, Q, R, S, T, U, and V. It splits the land into 5 zones, marked Z1, Z2, Z3, Z4, and Z5. We need to connect these zones using the least number of bridges. Out of the following options, which one is correct? Note:
In the given figure, PQRS is a square of side 2 cm, and PLMN is a rectangle. The corner \( L \) of the rectangle is on the side \( QR \). Side \( MN \) of the rectangle passes through the corner \( S \) of the square. What is the area (in cm\(^2\)) of the rectangle PLMN? Note: